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DERIVATIVES - (Derivative position) (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
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Derivatives designated as hedges | Interest rate swaps related to client deposits and borrowings |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount, derivative asset | $ 1,150,000 | $ 550,000
Fair Value, Other Assets |  | 585
Fair Value, Other Liabilities | 3,771 | 1,205
Derivatives not designated as hedges | Interest rate swaps |  |
Derivative Instruments and Hedging Activities Disclosures [Line Items] |  |
Notional amount, derivative asset | 69,000 | 69,000
Fair Value, Other Assets | 941 | 334
Fair Value, Other Liabilities | $ 941 | $ 334

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